Frederick westwood



(No Model.)

P. WESTWOOD.

CRANK FOR VELOGIPEDES.

N01 476.911. Patented June 14, 1892.

INVENTOR.

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UNITED STATES PATENT OFFICE.

FREDERICK WVESTVVOOD, OF BIRMINGHAM, ENGLAND.

CRANK FOR VELOCIPEDES.

SIECIFIGATION forming part of Letters Patent No. 476,911, dated June 14,1892.

Application filed February 9, 1892. Serial No. 420,868. (No model.)Patented in England July 3, 1891, No. 11,284-

T0 60% whom it may concern:

Beitknown that I, FREDERICK WEsrwooD, a subject of the Queen of GreatBritain, residing at Birmingham,in the county of VVarwick, England, haveinvented a new and useful Improvement in Cranks for Velocipedes, (forwhich I have obtained a patent in Great Britain, No. 11,284, bearingdate of July 3, 1891,) of which the followingis a specification.

My invention relates to an improved detachable crank for use onvelocipedes; and it consists of a crank having a split boss adapted tobe drawn together by a transverse screw or bolt, and of a semicircularkey carried by the said boss and protruding into the eye thereof, sothat it engages with a semicir-v and Fig. 2 is a broken View, insectional eleears a screw or bolt B passes, the said bolt passing freelythrough one of the said lugs or cars and screwing into the other, so asto draw the two together, and so contract the eye of the boss of thecrank, and thus cause it to grip the axle X. To look the bolt,'alock-nut b is screwed onto its free end. In the slot a, formed by andbetween the two lugs or cars (t a, is placed a flat key 0, protrudinginto the eye of the boss A of the crank in semicircular form, and ofsuch a size that the boltB passes through it. In the axle X is cut akeyway a: of semicircular form in longitudinal section, adapted toreceive the semicircular key 0.

To fix the crank on the axle, the key C is removed from the slot at toallow the crank to be passed onto the axle. The key G is then passeddowninto the slot a until it fits in the keyway ac in the axle. The bolt1B is then screwed into the lugs or ears aa, passing through a hole inthe key C and tightened up, which clamps the boss of the crank onto theaxle, and at the same time forces the key 0 down into the keyway 5c.

WVhatI claim is- The combination, with an axle the end'of which isprovided with a round-bottomed keyway, of a crank-hub provided with aslot and a boss on each side of the slot, a circular key in the slot andprojecting therefrom into the said keyway, and a bolt passing throughthe said bosses and through the key, whereby all the said parts aresecurely clamped together, substantially as set forth.

FREDERICK \VESTVVOOD.

Witnesses:

HERBERT FRANK BEAMISH, FREDERICK HALE.

